PaulS:
A stepper motor requires a lot of current. They are rarely the correct choice for mobile projects that need to carry their own batteries. A servo motor can probably wave the phone around just as easily, requiring far less current.
I guess you missed the part about LIDAR + 360 degrees (and the implication that this requires exact positioning and no servo jitter).
PaulS:
The pink one. Which model iPhone? Which case? What does the whole thing weigh? How will it be connected to the stepper?...
Guess I should read ahead before typing, since you did list the weight. But, the torque that a stepper motor can generate depends on many factors - voltage, current, and speed, among others. Stepping slowly uses less current than stepping fast.
I guess you should read ahead before typing, indeed. The whole post has a bunch of info which, if you are going to take the time to reply, you might want to read.
PaulS:
Interesting to see an estimate to the nearest 10th of a gram when you don't know a critical component's weight.
Interesting to see another snotty remark which doesn't add much to the conversation or even acknowledges my calculations.
I make it very clear that 607.6g is without counting the stepper cause I need the answer to the first question. I also compute the torques for 2 motors, which I believe given the 607.6g leave me enough room for adding more things after.
It is also interesting that some components, like a qtr-3rc weight... guess... 0.6g.
PaulS:
The Arduino has a builtin regulator. You can supply up to about 12V to the regulator, and it will output the required 3.3V to power the Arduino. The rest it will waste, as heat, which could be a problem. Having the Arduino-controlled robot stop doing anything because the robot batteries went dead is probably not a good thing. A separate power supply is.
I am talking about supplying either 6V with four AAs and using a step up to leave it at around 7.5V or using 2 18650s for 7.4V (and maybe just a regulator so that the 7.4 stays put when the batteries start dropping voltage).
In any case if someone else has something constructive to add please let me know. Thanks.